diff options
Diffstat (limited to 'man/man5/zfs-module-parameters.5')
| -rw-r--r-- | man/man5/zfs-module-parameters.5 | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/man/man5/zfs-module-parameters.5 b/man/man5/zfs-module-parameters.5 index 7b0199de2..79855e72d 100644 --- a/man/man5/zfs-module-parameters.5 +++ b/man/man5/zfs-module-parameters.5 @@ -838,11 +838,15 @@ Default value: \fB67,108,864\fR. .RS 12n Select a fletcher 4 implementation. .sp -Supported selectors are: \fBfastest\fR, \fBscalar\fR, and \fBavx2\fR when -AVX2 is supported by the processor. If multiple implementations of fletcher 4 -are available the \fBfastest\fR will be chosen using a micro benchmark. -Selecting \fBscalar\fR results in the original CPU based calculation being -used, \fBavx2\fR uses the AVX2 vector instructions to compute a fletcher 4. +Supported selectors are: \fBfastest\fR, \fBscalar\fR, \fBsse2\fR, \fBssse3\fR, +and \fBavx2\fR. All of the selectors except \fBfastest\fR and \fBscalar\fR +require instruction set extensions to be available and will only appear if ZFS +detects that they are present at runtime. If multiple implementations of +fletcher 4 are available, the \fBfastest\fR will be chosen using a micro +benchmark. Selecting \fBscalar\fR results in the original CPU based calculation +being used. Selecting any option other than \fBfastest\fR and \fBscalar\fR +results in vector instructions from the respective CPU instruction set being +used. .sp Default value: \fBfastest\fR. .RE |